1. Extraordinarily good or great; used especially as an intensifier
   "a marvellous collection of rare books"
   - fantastic, grand, howling, marvelous [US], rattling, terrific, tremendous, wonderful, wondrous 
2. Too improbable to admit of belief
   - improbable, marvelous [US], tall 
3. Being or having the character of a miracle
   - marvelous [US], miraculous

See also: extraordinary, incredible, marvel, supernatural, unbelievable

• kill oneself
• kill two birds with one stone
• kill zone
• killable
• Killarney fern
• killdeer
• killdeer plover
• killer
• killer bee
• killer cell
• killer T cell
• killer whale
• killick
• killifish
• killing
• killing field
• killing zone
• killingly
• killjoy
• killock
• kiln
• kiln-dried
• kilo
• kilobit
• kilobyte